Use marshal pre 1.2.0

nimterop/conan.nim

@@ -1,4 +1,9 @@
-import json, os, strformat, strutils, tables
+import os, strformat, strutils, tables
+
+when (NimMajor, NimMinor, NimPatch) < (1, 2, 0):
+  import marshal
+else:
+  import json
 
 type
   ConanPackage* = ref object
@@ -272,6 +277,9 @@ proc loadConanInfo*(outdir: string): ConanPackage =
     file = outdir / conanInfo
 
   if fileExists(file):
+    when (NimMajor, NimMinor, NimPatch) < (1, 2, 0):
+      result = to[ConanPackage](readFile(file))
+    else:
       try:
         result = to(readFile(file).parseJson(), ConanPackage)
       except:
@@ -283,6 +291,9 @@ proc saveConanInfo*(pkg: ConanPackage, outdir: string) =
   let
     file = outdir / conanInfo
 
+  when (NimMajor, NimMinor, NimPatch) < (1, 2, 0):
+    writeFile(file, $$pkg)
+  else:
     writeFile(file, $(%pkg))
 
 proc parseConanManifest(pkg: ConanPackage, outdir: string) =

nimterop/jbb.nim

@@ -1,5 +1,8 @@
 import json, os, strutils
 
+when (NimMajor, NimMinor, NimPatch) < (1, 2, 0):
+  import marshal
+
 type
   JBBPackage* = ref object
     ## JBBPackage type that stores package information
@@ -143,6 +146,9 @@ proc loadJBBInfo*(outdir: string): JBBPackage =
     file = outdir / jbbInfo
 
   if fileExists(file):
+    when (NimMajor, NimMinor, NimPatch) < (1, 2, 0):
+      result = to[JBBPackage](readFile(file))
+    else:
       try:
         result = to(readFile(file).parseJson(), JBBPackage)
       except:
@@ -154,6 +160,9 @@ proc saveJBBInfo*(pkg: JBBPackage, outdir: string) =
   let
     file = outdir / jbbInfo
 
+  when (NimMajor, NimMinor, NimPatch) < (1, 2, 0):
+    writeFile(file, $$pkg)
+  else:
     writeFile(file, $(%pkg))
 
 proc dlJBBRequires*(pkg: JBBPackage, outdir: string)